What number should the grocery store call for goods (food) and supplies? (It shouldn't be the phone number at the back of the parcel, should it? )?

E-ticket is the electronic image and electronic number record of ordinary paper ticket, referred to as e-ticket. As the most advanced ticket form in the world at present, relying on modern information technology, it has realized the paperless and electronic procedures of booking, settlement and check-in, which has brought many conveniences to passengers and reduced the cost for airlines. For passengers, its use is no different from that of traditional paper tickets.